I am looking for a 2-meter mobile radio that has Part 90 certification so it can also transmit out of the ham band and in the 150mhz area. A dual band UHF for transmit in the 460 range would be a plus.
Unless you are looking at the Cheap Chinese Radios, a dual band Part 90 radio is going to be expensive. If you have room, you'd save some money by running a separate VHF and UHF radio. That would also allow you to run band specific antennas for each radio, and that makes more sense when you are looking at covering a wide portion of the bands.
For my personal vehicles...
I'm running a Motorola CDM-1550 in my truck. It'll cover 2 meter band and all the way up to 174MHz. You can do a remote head kit that allows it to squeeze in some small spaces. There is a ton of used ones on the market.
I'm running a Kenwood TK-7180H in my wife's truck. Like the CDM, it'll cover 136-174. It has a smaller control head, so it fits better in her smaller truck. The Kenwood programming software is easier to use than the Motorola. It's also easier to get. Kenwood is/was still producing the TK-x180 mobiles, so you can get them new or used.
For UHF, both the CDM and TK-8180 will do what you want. Just make sure you get the right bandsplit. Unlike the VHF models, the UHF models do not cover the entire band.