Some builders (Simon (Tatey) amongst them) used Premier looms and where happy with the products.
http://www.premierwiring.co.uk/
You need to send them an email as their website is just this page.
This company has also been recommended by Arfon (The Arf):
http://www.s-v-c.co.uk/category/rapid-fit-looms/
They have 3 universal looms, you might find what you need there.
Hope this will help
