So I made it to Felicity Farseer my Fer de Lance and I need sulphur to upgrade my powerplant.
But my Fer de lance isn't realy outfitted to go mining..... My Asp Explorer is....
But can I use the Asp to get the sulphur and upgrade the power plant of my Fer de lance?
Technically, there are no class 1 SRV hangars, smallest is class 2, but the above advice is good. Just get an SRV, find a planet that has high sulphur content by mousing over it in the system map and go prospecting. You'll have plenty in short order.
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Also do not forget that you can trade materials with material traders so if you have a lot of Iron for example, you can trade it for sulphur or if you get any of the rarer materials, you can a get a lot of sulphur from them. Therefore I normally do not even try to get these lower tier materials, I instead just trade for them.