Here is a commonly available BOV from a 90-94 Eclipse/Talon/Laser -

http://cgi.ebay.com/ebaymotors/1G-BOV-uncrushed_W0QQcmdZViewItemQQcategoryZ33742QQihZ016QQitemZ260025126520QQrdZ1QQsspagenameZWDVW

The flange is of the same shape as the EGR valve so you can put the mixing pipe to good use. The BOV is bigger though so it might need an adapter.

The nipple on top is for a boost singal from the intake plenum - boost to keep the BOV closed when the TB is open, vacuum to help open the BOV when the TB is closed.

Crushed refers to the common practice of collapsing the chamber to raise preload on the spring so the BOV doesn't leak when max boost is increased. I believe they're good to 17 psi if crushed properly.

Sixto
93 300SD