There is a pro mini 3.3V Fritzing part available if you enter the search term arduino pro mini in parts search (it may be in Sparkfun somewhere as I don't see it in Ardunino but it does come up in search). You likely need to see if the 3.3V mini will take 5V as its raw voltage or the lipo charger/regulator comes in a 3.3V version though. Doing without level translation is a good bet as translation is generally a pain.
Peter