Can anyone recommend the correct Spinfit model for Tozo Golden X1s?

I just recently got the Tozo Golden X1s for Christmas. My ear canals are so large that I always have to go with the biggest ear tips available. I did the same with the Tozos. My left ear feels fine & pretty snug. The right ear still is not tight enough for me. I was thinking of trying an alternative tip. I've heard of Spinfit & other such brands but never used them before. Is there a universal model I should buy? If not, what do I specifically need to look up as far as size is concerned? And what exactly differentiates them from regular tips? Thanks.