you can have 2 for example vauxhall corsas , both with TPMS but different valve stems , some bolt in some are rubber , both of these are different to say for , bmw honda etc , generally speaking we stock most of the popular valves which is probably the 10 most popular , these fit 90% of the vehicles we see , when cars come in that we don't stock the valve we will just fit an ordinary valve whilst a specific valve is ordered .
most good independents tend stock all the popular valves so shouldn't be an issue , i'm always dubious of the quality of "online" products like valves etc , surprising the difference in quality between a decent brand and a cheap one