Ted did think about designing one but the majority of customers wanting 48" grapples have small tractors generally without quick attach and he isn't interested in doing any custom mounts at this time.
Most customers i've talked to prefer the double lid design, especially with our 54" Wicked Grapple being as light as it is.
I wouldn't totally count the 48" out for the future, but the next grapple out of our factory will be a C shaped grapple rake like the Bradco Compact Root Rake. It was supposed to be designed and on the market already but has been pushed back because we've been so busy this spring.