PAI has the models hidden in the 'PAI Models & Flight Dynamics packages' section. Official files, just above the caption 'Links'

it's the same as the one made by George Sukhykh, with different texture names.

Conversion table from original to PAI:
sides=pai_tu134_si
top=pai_tu134_tp
wing1=pai_tu134_w1
wing2=pai_tu134_w2
_LM textures go the same way.

There is the version made by V.Stolpiansky. this one has a marginal VC. watch out, there are 2 different models.

The third one: has photoreal textures and inbuilt scenery. not too much liverys. get it from here(you need at least the base package)