Oracle Delphi Acrylic mat - Madrigal cartridge?


I just bought an Oracle Delphi MK III that came without a mat for the platter. How do I find one of these or is there one for sale among the audiogon crowd? The turntable has a dark brown or black cartridge with a big M on the front already. I don't know what brand of cartridge this is? My friend thinks this might be an old Madrigal cartridge. I need to set my phono stage properly and want to find out about its spec's, etc. What do you know about this cartridge? Any help would be appreciated.
lyonpowers
Big "M". Yes, it is a Madrigal Carnegie One cartridge. This cartridge was not cheap those days.....1988-1990. I have owned on of them and did not like the sound.

Cost of the cartridge was US$690 in 1988 and recommended tracking force is 1.7 grams. I do not know the output. A good guess would be.. around 0.4mv. This is a Moving coil cartridge.
Oracle Acrylic mat can be bought directly from Oracle or from a local dealer. Cost is around $100
For a mat (the new, and better mat) contact Brooklyn Audio, through the Audiogon site. They are a Oracle dealer out of Nova Scotia. I purchased both my Oracle, and a mat upgrade from them. Or contact Oracle in Quebec 1-819-868-0284 (phone) or 1-819-868-0150 (fax). It's a great table.... Enjoy!