Need Part number for check valve

[police4412]

Hello all
I'm looking for a part number for a check valve to put between my PCV valve and my vacuum block. When I'm in boost my PCV valve is sucking oil into the vacuum block. I thought I had a blown turbo or worst until I did some research on the forum and learned a check valve may do the trick. I search all over for a check valve without any luck. I hope someone can steer me in the right direction.
Thanks Ted

 

[turbo nasty]

1986 1987 Buick Regal Grand National Turbo T T-Type GNX PCV IN-LINE CHECK VALVE #6769

I got mine from ATR before they went boobs up, this one looks the same though.