Same here @paul2009. Had a client wait 3 years to move to Squarespace because of this one hurdle. We're doing it anyways while we look for a solution. This is their current table search page, which uses the ultra basic TablePress plugin to look up brands and models they service.
Some have recommended Caspio but it looks too complicated.
There are some overly complicated solutions using google spreadsheets. Others have implemented similar. Lots of chat in this forum.
Could Awesome Table, Sheet2Site (expensive), or that Custom Table Block plugin be a solution?
Another user suggested "You can create table with Code Block, then you can add filter/search function." ?
Thanks for any expert advice. Awesome Table or some very easy plug and play/free option would be ideal.