I propose a Scrap Yard version of a skeletonized SAR4, but scaled down:
3.25" to 3.5" blade length
7.5" to 8.0" overall length
.125" to .156" blade thickness
1.0" and 1.25" blade width
It would be made out of D2 or SR101 (and possible INFI LE offering at .186" thick).