
Hi Anwen, I imagine you will have to wait quite a bit longer than 2 or 3 weeks - probably several months, maybe longer. Most reputable breeders will have waiting lists, so it's probably a good idea to research what breeder(s) dogs you like the look of and then join the waiting list. The right puppy should be worth the wait. Try contacting the breed club, you can find details here: http://www.welshterrierclub.pwp.blueyonder.co.uk/. Also, visit with breeders and go along to some shows to get an idea of the different lines.
Terriers thrive on company, so working from home or making sure that they have plenty of company during the day is a must. ( any dogwalkers, relatives, neighbours who can visit?).
Good Luck in your search and all the best if you decide on getting a dog.
Joanne