Any turbo change will also require spark/fuel tuning etc to suit.

If you are prepared to adapt some parts to make a different turbo fit, then there are thousands of options

Something like a GT2860 would probably work well.

This would normally be a T25 flange, but your manifold could likely be drilled/tapped to suit and you'd need to remake some pipes.

Or even a small Hoslet is pretty cheap https://www.stavtech.co.uk/home/stav...-and-downpipes

https://www.speedingparts.co.uk/p/tu...BoCpWEQAvD_BwE

There will literally be hundreds of similar options