Try contacting this guy: blademan21@netzero.com" <blademan21@netzero.com> . He makes them. Here is part of an email I got from him last summer on speed strips for a 44 special:
Saw that you carry a .44spl. I also could not find speed strips for my 5-shot .44spl's.
So I spent a lot of time researching and found that if I modified a rifle stripper clip I could turn it into a .44 speed strip. At first I blued them,didn't like that. Then I tried painting them, they came out worse. Now,after modifying them I send them out for powder coating. The rest,as they say,is history.
They are flat and easy to conceal, easy to use and are durable. They hold 5 rounds,perfect for your .44, and are in stock now. This past Monday I picked a batch form the powder coater. This morning I mailed out 8 and a pouch. Four and 1 pouch went to Denton,Texas. The other 4 went to Coshocton,Ohio.
The speed strips are $8.00 each and the pouch is $25.00. The picture of the pouch is of the prototype that is raw. It had not been dyed black. I wanted to see what one would look like before I had better ones made.
“It is the belief that violence is an aberration that is dangerous because it lulls us into forgetting how easily violence may erupt in quiescent places.” S. Pinker
Wish I could take credit! It came off one of the numerous forums several years ago. Google should probably find results.
One modification that I have considered is gluing a second, unpunched strip to the back to provide some stiffness. I am worried about getting glue too close to the holes which wouldn't allow the rim to be inserted.