Definitely look at the Metz 45 range. I have a CL-1 which came with rechargeable battery and charger for 30 from ebay. The NICADs could probably do with replacing but they will hold a charge and power the flash well enough.

Bought the CL-1 as the early CT-1s can have a scarily high trigger voltage, and I can't help thinking this isn't good for even mechanical film cameras in the long term.