Newbie Questions

[Ginger]

Hi All, Acquired a preowned 323i recently, first time owner of the brand, would appreciate if anyone can assist on the following:1. Assuming RFT begins to lose pressure, can we top up with mobility kit/tyre inflator/sealer until the nearest tyre shop? Maybe worrying too much but just in case it happens in the suburbs.2. Where can I buy leather fabric/sheets by the yard, purpose: as a liner when I sit on the bumper to change shoes/load stuff. The BMW ones cost about $400, rather stiff for me. Called a cushion shop and they refuse to sell saying they use up all scraps, and if they do it's by roll. (He must be thinking if I'm a competitor on survey)3. What leathercare product/brand would you recommend, I don't like those that leave a shiny effect. Thanks alot for your help.My apologies if I'm not allowed to post different topics in one thread.