Or...don't just go for the best prices since many brands are rubbish. Shop around for the best brands, then get the best price. Or you may be happy with just a refreshed interior which isn't quite correct in places and fit is a bit hmm. Compare the prices. No complete kit where options come in it. When you find particular door trims, carpet, seat covers etc, that you want, google them further, ignore the ads and look for forums and people using them to see how they fit and look and the quality to decide if it suits.
Just noticed in the 78ta.com shop is that they are also now distributors for Legendary Interiors, who have a reputation for originality far above the rest, but of course, not all brands have complete range either. If looking for a deal through them or others, see what they can get that isn't listed. Don't forget all the plastic trims and clips and panels either, luckily black is easy to get and some guys will dye them for you pre-sale if needed.