Turbo upgrades for a 2.4td 6cyl

[gambit420s]

i am looking to upgrade a TA0307 and i was thinking about TB2553. but i can't find maps for either

does anyone have any opinions about this turbo/fitment issues?

Any other options?

possible ball bearing turbos?

fyi:

TA0307
466088-1
Garrett
Compressor housing .42
Turbine housing .36
trim 57

i cant seem to find maps for either turbo, any help?