Princeton Reverb vibe from a Mark IVb????

[Mountain Fever]

I have been wanting to get the sound of the PRRI....hopefully without having to buy one.

I know that the Fender is running 6V6's, and I guess from what I have read you can even use 6V6's in the Mark if you are on the tweed setting.

Anyone had any luck just getting it close using all of the tone choices on the Mark, or as a last resort with the 6V6's swapped out in the tweed setting?

Thanks for your input!