Mike:

If you have Toolkit and if you would like all of the records attached to the correct current customer then I think this will work (not tested):

1. Create a 'dummy' prospect that has a similar but not identical code as HALTON (maybe HALTN2), move the history quote to current, assign it to this 'dummy' prospect.

2. Use Toolkit to merge HALTN2 into HALTON.

3. Now move the quote back to history.