Replacement TPMS Sensors

Hi to all those technically inclined.

I've got a TPMS sensor running out of battery life and need to source a replacement unit, and will need more in time. Having purchased a TPMS kit that displays the outputs through my aftermarket multimedia unit in the 4WD (uses 433.92 Mhz frequency) I now cannot get replacement internal sensor units from the supplier I bought the kit from several years ago. Yes they are still in business, they just don't have the TPMS kit anymore and don't plan on producing more kits in the future. A few emails back and forth was no help as they couldn't even provide me with the OEM supplier details for a direct approach!!!

Having exhausted my internet research for potential alternatives I've hit a bit of a brick wall. There are a lot of aftermarket suppliers that can provide replacement sensors for lots of vehicles by brand name that will work with OEM software, but nothing of a more generic application. Some claim they produce aftermarket sensors in a wide re-learning format that can be used with brand name/type vehicles. My dilemma is, will they work with my "non-specific" Chinese knock off?

I would like to hear from anyone who has been able to find replacement TPMS internal sensor units at a half decent price that would be compatible with my system (if possibly available) and/or some advice on the compatibility of the various re-learning replacement sensor units available on the internet for my Chinese monitoring software? Is the TPMS software and sensor interface a unique bit of computer programming or is it far more generic and simple than I'm thinking it is at this time? Will appreciate any useful advice to these two queries from people monitoring this forum.

I thought I would try here before I give up on the current TPMS I have and I'm forced to get something else with a separate screen (which I wanted to avoid in the first instance!!). Hope someone can help.

Cheers

Rob K