Well, I got my copy of 831 on ebay....keep checkin there everyday and something will pop up....you could also try www.xchangemusic.com and see if anyone is selling those items....Good Luck!
I was looking hard for 831....my best find ever! Although the quality of the vinyl could have been better, but u get what u can find...

Just curious...how much did that 831 go for when you bought it?

after shipping.....$30.00

It was funny at the time this was being auctioned off because when one copy came up, another soon followed....so there were 2 of them at the same time, and none since....but i'm sure it will appear again

Jupiter & Silhouette are on the gatecrasher wet triple
vinyl.
But you would have to pay good money for it on ebay

Man. id love to get my hands on that track for 30$.