The lowest cost thermal with 640 resolution and LRF you have two options, now that Finder V2 models are sold out...be careful of youtube advice, videos ,etc and people who have only tried a few products telling you what to buy...
NocPix Lumi H35R
The compact NocPix Lumi H35R thermal monocular features a 12 micron 640X512 resolution <18mk sensor, in a compact design, with inbuilt 800m LRF System.
www.blackwoodoutdoors.co.uk
Pixfra Arc A635 LRF
The Pixfra Arc A635P LRF Pro is a thermal monocular with a 640×512 resolution, 12µm pixel pitch, <20mK NETD sensor, and 35mm f1.0 lens.
www.blackwoodoutdoors.co.uk
There is also the
NocPix Lumi L35R model , although that is 384 res.
The compact NocPix Lumi L35R thermal monocular features a 12 micron 384x288 resolution <18mk sensor, in a compact design, with inbuilt 800m LRF System.
www.blackwoodoutdoors.co.uk