I may have made a good deal

So, one of my team members is going to be making an order before the next event. He is also looking at getting a scope for his M4, well I have a scope that looks like "Watch your language" on my Bar 10 so he said if I trade him that he would be willing to buy me a few things as long as the price was under $50. I do know I need a few things for my Bar 10. number one I need new sears for it. Along with the Hop Up spring so could somebody link me the sears off of Evike? I would but I don't know what to look for or under.

Heres the first thing I need

I need that little spring not the whole thing but you can't just buy a stupid little spring.
http://www.airsoftpost.com/product_info.php?cPath=24_579&products_id=30786

I do need sears though I want the JG bar 10 replacement sears (I know I'm cheap) they will last me a year or two which is fine until I can get a job and buy the upgraded ones.

why does it have to be that specific spring? im sure if you ran to a hardware store, or model store, they would have springs galore. so you can find the spring you need. there isn't going to be too much stress on the hop-up spring. so anything should work. not springs specifically tailored for stress or airsoft