Does anyone know an equivalent replacement for the v-drive oil pressure switch?

I picked up one for the fuel/engine block which is a normally open switch. However the v-drive one is a normally closed switch and the descriptions at autozone website don't tell which type the switches are. Skidim wants $48 for a $6 part...Ouch...

http://www.skidim.com/prodinfo.asp?number=WAL49