Hi,
I have used these suppliers.
ArcEuroTrade Very Good Service. Good value for money.
Motion Control Products Very Good service and support. You name what you are after or if you don't know they help. Mixture of Electronic and Mechanical products.
DIYCNC Excellent Service and support. Just started using them, very experienced in electronics.
If you have any problems or just get stuck where to go next this forum is this best one I have seen and used.
You will have to shop around if budget is tight.
Any problems or you need pointing in the right direction you can contact me or put it on the forum for international help.
Hope this is of any help for you.
Regards
Mel