Well no, since it was a copy made on cheap Spanish receivers . 
But I bet you could come up with some tweaks even De Lisle missed.
Updated / modernized if nothing else. 
I wouldn't bother with SBR though, use the extra barrel length for more silencer.
One tax stamp is enough. I wouldn't want to pay for 2 on one gun unless it was full auto. 5" of rifled barrel plus 11" integrated suppressor, or 4.5" plus 11.5", could make for a nice quiet 16" barrelled .45 carbine
without the pregnant look of the De Lisle carbine's barrel. That was a really cool weapon but the suppressor looks way fatter than any cans or integrated suppressors I see for .45s.
I saw a suppressed 16" drop-in bull barrel for a 10/22 that was only rifled for the first 5.5" IIRC. I thought that was awfully short for a rifle and wondered what effect it would have on accuracy. I didn't think about it until now but .22 LR pistols don't have any problems with complete powder burn, lack of accuracy, etc. in 5.5" barrels. The unrifled part of the barrel should keep the bullet on course, and 10.5" of built-in suppressor on a 10/22 sounds really good to me. Being a pistol caliber, a suppressed .45 ACP carbine wouldn't need much of the barrel rifled either. A lot of gun writers were getting better accuracy from 3" Para-Ord/USA pistols than the average 5" 1911 .45. Length isn't the only thing that maters... it's what you do with it.