Give ya a pound.........CASH......Have you looked at how much a new one is......how old is yours...etc. What about looking on google and seeing if any come up for sale, or E-bay.
How about calling a welding supplier and asking?
believe its after a 1997, does not look like much work done, and 400amp
60% duty cycle
they are on ebay for £1200 but that means nothing as might still be there next year
the pound is tempting me