I was looking at various alternatives to the weak 2G BOV and I purchased a 1G BOV with upper pipe from a forum member at a fair price and decided to build the adapter myself.
Before I got started I was taking a look at a friend's Lancer EVO VIII and noticed the stock BOV looked remarkably similar to my 2G BOV. He runs 19-23lbs and the stock piece seems to work just fine.

I went on an EVO forum and looked for stock BOVs for sale and I picked one up for $20 shipped that was in excellent condition. When it arrived I checked and sure enough the stock tube was the same size as the 2G BOV.

Here is a picture of the EVO VIII BOV:


Here is a comparison between the EVO and 2G BOVs.


The body is a little deeper on the EVO BOV and the nipple for the vacuum source is ~120* CCW from the stock location. The stock line from the manifold is long enough to hook up with out any kinks so the install required no modifications.

Before (Stock 2G BOV)


After (EVO VIII BOV)


The results?...
I no-longer have a boost leak and it holds boost just fine at 15lbs, I can't test any higher as I don't have the supporting mods to do so, yet.

I think for $20 this is an excellent "budget" solution, but your mileage may vary.

[/b]Update:[/b]
The EVO BOV held rock solid on a boost leak test at both 15lbs, and 23lbs.
As always, you should verify that it is functioning after install by doing a boost leak test.