Or bring your ewes round to someone else for about 5 - 6 weeks, if they also have a small flock and resident tup is not overworked... Just need to be careful about bringing anything nasty back with your ewes (scab, fluke, worms etc,), but obviously not too onerous if you think about it beforehand.
Depends also on the breed of sheep you have, and how near suitable tup(s) are, pedigree vs commercial.