Anyone know a good semi-custom transistor array vendor?

I'm looking for a product - similar to the semi-custom transistor
arrays Cherry Semiconductor (now ON) or GEC/Plessey used to have back
in the early 90's: an array with hundreds of transistors, with some
larger devices around the periphery. They had some cross-unders and
some resistors too. I'd prefer to customize only one metal layer. I
have some past experience with the old Cherry product. I plan on
providing the layout but will consider outsourcing layout to the
vendor. Vendor must be capable of packaging and testing. My specs:
Process: bipolar or CMOS
1 GHz ft if Bipolar
<= 0.5 u if CMOS
350 transistors
process voltage >= 5 volts

Thanks, Frank
.