Hi Mike and Phil,
I'm aware of Scale Link, but as commented, they are so much more expensive than Oxford and then there is postage to my home in France, while Hattons send them here for just £1.50 per model or £3.00 for a loco weight order. They still need fettling and in the case of saloons, this can be as interesting as the kit builds, as below:
Besides the joy of fettling, Oxford's small details such as number pates and badges add much desirability that can be difficult to replicate with kit builds, although I have found a limited range of decals. Although 1:76 scale, it's useless trying to fit same scale occupants, so a good selection of seated HO little people is essential! The A7 above still needs a little exterior treatment, mainly a coat of satin varnish, starting handle and wing mirrors. Some models however can still appear toy like, so need careful selection and placement.
I know this is an Oxford thread, but I've also found that John Day white metal kits, as now re-energised by Daryle Toney, are also very good and make up well.
Best to all,
Bill