I would repeat it in Photoshop. If "X" is my original image and its 64x64 , I would do this:
I would open a new 1024x1024 blank image and copy it again and again (like in a 8x8 matrix) like so:
[X X X X X X X X]
[X X X X X X X X]
[X X X X X X X X]
[X X X X X X X X]
[X X X X X X X X]
[X X X X X X X X]
[X X X X X X X X]
[X X X X X X X X]
Then save that image, and apply it to my object, so it would be tiled at runtime.
I've used a lot of complex models (7000+ polys) with big images before (When I wanted a detailed UV object, with a complex map), and so far I haven't had problems with fps, 4-7 frames at the most. Of course, I used MemoryHelper.compact(); and Loader.clearCache(); too...
Maybe it's just me, but you won't know unless you try
Plus, what ErgonOlsen said just now is true, I typed the method above because I've no idea how Blender works, I use something else.