Harman Kardon RABCO ST-7 Source for Replacement Belts

[cemerson]

I've recently purchased a Harman Kardon RABCO ST-7 and am looking to replace the belts. Are they both the same? If not, any suggestions for a good reliable vendor to purchase these from and know I'll get the correct size belts. I've purchased belts for other turntables and found that if I didn't know what size the belt was I was looking for, it could be hit or miss. Does anyone know the correct size or sizes?

Thanks, Chris