If the reg is knackerd and can't be repaired, you will be looking at a minimum of £200. There are a few people who put there own regs in any make of rifle, but as yours is a Ripper I would send it to Steve Wilkins of Ripley. Have a look in the manufacturer's section on here, you should find a link to website and or phone number. Neil.
PS: Who looked at it for you.
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