I have modified the Stevo's vanilla custard (found on this site) for use with some fruits and it is really pretty good.
12% vanilla custard (CAP)
1% eggnog (LA)
3% smooth (TFA)
2% graham cracker (TFA)
6% banana cream (LA)
you can also replace the banana with:
7% strawberries and cream (CAP) or
8% blueberry extra (TFA) and 2% bavarian cream or
8% peaches and cream (CAP) or
6% pumpkin pie (CAP) 4% sweet cream (TFA)
The original recipe is really good, you just have to find out what addon flavors you like to go with it.