Yes indeed very hard to find parts. Try Vinny "Vintage Drum Bug" he might have something as far as originals go. My drum came with a Pearl strainer much like the Ludwig style. Previous owner made 2 bar type brackets to bolt the strainer to, then bolt it to the shell. My drum had the original tension side. But you could fab something to use something for a butt end. Took a good year to find an original pair. I made one out of wood which worked very well until the originals came along. I found and used all the hardware parts in my nuts-bolts-springs etc bins. It worked quite well too. I just ordered a repop handle which is still available. Try a search here you'll find lots of info and pics on them. Some from me as well.

There's also a few versions of the strainer. Main difference is the way the snare wire attach. The guide here shows the differences through the years. And also the rosewood version the rolling bomber snares have. The main pitfall with these are the body's are stamped from brass sheets. So they do bend, twist over time if misused. The throw and tension body's are pretty much the same. The exception is the throw side has 2 notches where the handle base attaches. It's too bad Slingerland didn't make this a cast part. Would have held up better.

http://www.vintagedrumguide.com/drcjw/article_5_strainers_clam_shell-1.htm

Thanks Glenn. I figured out that the Sonor Dual Glide strainer and butt-end fits the holes perfectly as a modern alternative. The draw back is that the snare wires do not extend across the entire surface of the snare-side head for added sensitivity like with the clamshell. Also the drum loses a lot of it's vintage mojo with the original strainer and butt-end, but it's a more readily available alternative. The clamshells do not come up for sale very often.

A quick fix without the need to drill that precious vintage drum.

Nice Alan! I remember seeing that too. Had forgot about it. Great save.