I know it's not what you're looking for, but a Commander 1000 with TPE331-10 engines is a sweet aircraft, and it has a built in lavatory.
This particular aircraft has been through the Commander refurbishment program and has good avionics.
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Avionics/Radios
Garmin G600 with Synthetic Vision & XM weather
Garmin GTN 750 WAAS GPS/MFD. SafeTaxi & Charts, Traffic
Garmin GTN 650 WAAS GPS/MFD
Garmin GDL 88 ADS-B compliant with backup Nexrad Weather
Garmin GTX 33 (Dual) Transponders
Garmin GDL 69 Weather Datalink System
Garmin GMA 35 Audio Panel
Honeywell Enhanced Ground Proximity Warning System KGP-560 Class-B TAWS
Ryan TCAD 9900B Traffic Avoidance
Avidyne EX 500 FlightMax Multifunction Display
Bendix Color Radar
WX-500 Stormscope
Collins Radar Altimeter
Collins AP-106 Autopilot
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It's listed at $725K and has a "bring all offers" exhortation in the ad. I've always liked the Commander, and the few I've flown have provided a good fast ride. The 1000 Grand Commander is a helluva aircraft.
https://www.controller.com/listings/aircraft/for-sale/19124043/2000-commander-grand-renaissance