Here’s some assistance relating directly to your questions.
1) While it is likely we do have heads that would fit the Toca Synergy model Congas it not a line that we have tested as of yet so unfortunately I am not able to give you an answer without testing the drums. We do update our Crimplock Symmetry reference chart at http://remo.com/mini/crimplocksymmetry/ regularly so please check back.
2) The part numbers you reference here are correct for the LP Patato Conga and the Classic Tumba in the Tiger stripe finish.
3) Unfortunately there are not that many dealers carrying the Tiger stripe in stock. Most carry the Calf graphic models but you can special order the heads through your preferred dealer.