EDIT: I have two, a Sevcon and a GWP, both in the same format with the same connector (I don't have the mating connector). Pics below Sorry they're dusty; been sitting in a cabinet for a long while. The foil tape partly still on the Sevcon was there to try to shield against RFI in the project they came from, AFAICR. I've never used them myself (project just never happened), I think they were on a Zero MC before I got them, not sure if they were OEM.
They're solid potted, so water and vibration proof, built to go on vehicles.
I don't know how much current you need out of it, but either of these would probably supply more than most will need.
The Sevcon is listed as 72/80v to 13.5v 300W, doesn't specify the actual current max but I don't think it goes high enough in voltage for you.
The GWP is listed as 80-126VDC, 8.0A max on the input side, and 13.5VDC, 33A max on the output side.
https://www.digchip.com/datasheets/download_datasheet.php?id=8781006&part-number=EVD+450
View attachment download_datasheet[1].pdf
So I think the GWP will work for you, depending on your full charge voltage.
I guess...say, $50 + your choice of shipping from Phoenix, AZ 85051 to wherever you are?