I thought you was buying quality parts, not cheap parts, but even at the $250 swinger when its finished you will have $4- $5 in it.
Good luck with the cheap alba arms, I bought 2 sets a couple years ago, one for a banshee and one for a raptor 660 and I had issues with both sets, hopefully they got the bugs worked out.
Your searching for tubes for your a arms, start by finding a parts distributor and order them on line, I found them in 3 seconds.
If you have a local dealer ship, they probably have a website and you can order the parts and pick them up.