Advice on pickups for my TL-1TH

[Simon Barden]

You typically only need Fender spacing for the bridge pickup, so a P90 in the neck would be fine (which IMO is normally the best place for one). I've just measured a P90 against the neck position of one of my Teles and it's spot-on, whilst at the bridge position it's about 2mm too narrow.

[Woltz]

Simon is absolutely correct in what he says above with respect to the wire gauges and resistance etc.

Maybe these are what you really want - https://www.seymourduncan.com/pickup/p-rails-set

Another left field suggestion but you could always put Toasters or Filtertrons in it? That'll give you something different.