Bananagrams - where to buy spare letters

[TheMoonOnAStick15]

First world problem of course but it has come to my attention that our beloved set of Bananagrams is minus 3 tiles.

This might seem trivial but to committed Bananagramers it won't. Now that I know, it's preying in my mind mid game when I'm wondering if those missing tiles could make all the difference. (Yes, we really are that competitive and yes I really am that sad .)

Any idea where I can get replacements without buying a whole new set?