VGA is a 15 pin termination, do you know how you want the thing wired? Just having a VGA to RCA cable won't convert RGBHV signal to Component... but some videocards will pass component- if you know which pins the component signal is carried on.
Bluejeans charges around $100 for a 10 footer of this, which given the parts costs and level of work involved is a good price. I dunno if I could do it much cheaper- so you might consider buying from Kurt.