You can buy some crafting materials from vendors.  So far my number crunching says that sending your crew on missions for these materials is more cost effective.  This list of materials and prices is take from the Imperial Fleet Crafting Vendor in version 6.2a.  There are crafting vendors on other planets/locations. I can’t say for certain one way or the other if they have the same materials at the same price.

This table is sorted by material name.

Grade Class Material Cost
5 scavenging Brazing Flux 300
4 archaeology Brocart Filaments 225
1 scavenging Conductive Flux 15
2 scavenging Conductive Flux 15
6 archaeology Cortosis Substrate 600
7 archaeology Corundum Powder 900
9 archaeology Cranoran Thread 1800
3 archaeology Demicot Silk 150
9 scavenging Endothermic Flux 1800
1 archaeology Fibrous Nylite Solution 15
2 bioanalysis First Aid Kit 15
3 bioanalysis Hemosponge 75
4 bioanalysis Hypnogazer 150
1 bioanalysis Hypo-syringe 15
3 scavenging Insulating Flux 75
4 scavenging Insulating Flux 75
10 bioanalysis Mediscan Unit 2775
5 bioanalysis Memory-plastic 300
6 bioanalysis Myostim 600
8 bioanalysis Nervesplicer 1200
11 scavenging Premium Flerovium Flux 350
11 bioanalysis Premium Recombinator 350
11 archaeology Premium Veda Cloth 350
10 scavenging Protonic Flux 2775
11 scavenging Prototype Flerovium Flux 400
11 bioanalysis Prototype Recombinator 400
11 archaeology Prototype Veda Cloth 400
11 scavenging Standard Flerovium Flux 300
11 bioanalysis Standard Recombinator 300
11 archaeology Standard Veda Cloth 300
7 bioanalysis Stim Plug 900
2 archaeology Themoionic Gel Suspension 75
6 scavenging Thermoplast Flux 600
10 archaeology Travella Cloth 2775
7 scavenging Tricopper Flux 900
8 scavenging Vanadium Flux 1200
9 bioanalysis Vapro-sampler 1800
5 archaeology Zeyd-cloth 375
8 archaeology Zoosha Solution 1200

 

This table is sorted by discipline and grade of material.

Grade Class Material Cost
1 archaeology Fibrous Nylite Solution 15
2 archaeology Themoionic Gel Suspension 75
3 archaeology Demicot Silk 150
4 archaeology Brocart Filaments 225
5 archaeology Zeyd-cloth 375
6 archaeology Cortosis Substrate 600
7 archaeology Corundum Powder 900
8 archaeology Zoosha Solution 1200
9 archaeology Cranoran Thread 1800
10 archaeology Travella Cloth 2775
11 archaeology Premium Veda Cloth 350
11 archaeology Prototype Veda Cloth 400
11 archaeology Standard Veda Cloth 300
1 bioanalysis Hypo-syringe 15
2 bioanalysis First Aid Kit 15
3 bioanalysis Hemosponge 75
4 bioanalysis Hypnogazer 150
5 bioanalysis Memory-plastic 300
6 bioanalysis Myostim 600
7 bioanalysis Stim Plug 900
8 bioanalysis Nervesplicer 1200
9 bioanalysis Vapro-sampler 1800
10 bioanalysis Mediscan Unit 2775
11 bioanalysis Premium Recombinator 350
11 bioanalysis Prototype Recombinator 400
11 bioanalysis Standard Recombinator 300
1 scavenging Conductive Flux 15
2 scavenging Conductive Flux 15
3 scavenging Insulating Flux 75
4 scavenging Insulating Flux 75
5 scavenging Brazing Flux 300
6 scavenging Thermoplast Flux 600
7 scavenging Tricopper Flux 900
8 scavenging Vanadium Flux 1200
9 scavenging Endothermic Flux 1800
10 scavenging Protonic Flux 2775
11 scavenging Premium Flerovium Flux 350
11 scavenging Prototype Flerovium Flux 400
11 scavenging Standard Flerovium Flux 300