The nylon rollers my 30 year old Bramer Living Kitchen drawers have worn out. The company is no longer in business. Rollers measure 1/2

The nylon rollers my 30 year old Bramer Living Kitchen drawers have worn out. The company is no longer in business. Rollers measure 1/2

I'm afraid the original customer never got back to us. We still need to know the diameter of the wheel. If you can get me that, we may be able to find something to work as a substitute. However, based on the age, I cannot make any guarantees. There is a good chance this simply isn't available anymore.
I'm afraid it's the same story for us. 1/2" is just too small. The smallest I was able to find was our 10-142, which is 5/8", same as the store you already checked. I am very sorry that we cannot offer you an alternative.