I had a problem like this with mp3s downloaded from Amazon that would not show up on my Scion's oem head unit, but would play fine on the Kenwood in my Frontier. Same thumb drive used in both players. I (losing a bit of quality) simply re-encoded those files and then all was good.
LOL, thought I'd have some fun. Grocery Bag Packers.
2dr and 4dr versions
I printed the 2dr version for example.
The 2dr print holding 2 gallons of water.
DOWNLOAD The .STL files from Dropbox
I printed in ABS with 2 shells, 0.25mm layer height, 2mm solid top and bottom and 35% infill...
Just thought I'd post these up incase they may be useful to someone.
All numerals and the entire Alphabet are included in these archives.
Files made in Autodesk 123D Design (freeware) and ready for finishing and export to STL or other 3D files types. You can scale, round edges, bevel edges...