I know Meredith Instruments has a 1.62mW 612nm HeNe head only for sale for $300. It's a used gas laser. That's your best option if you want a 600nm to 620nm laser
The CNI 604 and 607 modules can not be placed in a handheld and the 607 at least was quoted at $4900. Cheap... not going to happen. you could try to analog modulate a 515 and a 635/50 and get an orange mix.