There is a few companies who rebuild wheels around the country. Its easy to get the wheel picked up by parcel force etc and delivered. Incidently theres an old guy near chester le street who totally rebuilt my yam tt350 wheels, i think hes under north east wheels. If your interested i can dig his number.
Theres also hagon wheels who are a bigger firm and will probamly have a fast turn around.
It would be worth sending your wheel away and get the rim inspected. It may be okay and save you a ton of money, unless your loaded anyway
Good luck, hope its sorted soon