Where to buy Philips P87C51RB 40 pin DIP?

My manager can't locate P87C51RB-4N on Digikey (and a few other sites which I can't remember). He mentioned that Arrow is a four week lead time.

I wouldn't mind using the P89xxx as alternative.

There is nothing magic about Philips. Other manufacturers would be OK. The key is I need the EROM.

Thanks,
Doug