Dump valve options

[Avi <Avi@cosmoslink.net>]

To all the turbo heads,
Anybody knows about a substitute for the Bosch dump valve, the one I am
using   (0 280 142 102) has a short life, does not like to run at 16PSI
very long, the diaphragm rapture inside and there is a "direct" connection
from the inlet of the valve to the vacuum line. 
The size of my openings is 7/8 of an inch. and I am looking for a valve
that will be able to handle at least 20PSI and have relatively small
physical size (as close as possible to the Bosch part).
Any ideas, suggestions?....... 
I do miss my dump valve, running without it, is much less fun....
Avi