[rescue] 811 box drive inserts?

[BSD Bob the old greybeard BSD freak]

I picked up an 811 lunchbox storage thing, and it has a single full-height
drive carrier for Sun 1.3 gig drive (st41600n).  Are there any drive
carrier inserts that will allow that box to handle 4 3.5 inch drives instead
of the one big 5.25 clunker, or am I stuck making one up, myself?

Thanks

Bob