[GZG] {DS2} HAD instead of LAD

Trying to match up some Stan Johansen 1/300th vehicles
for a tracked low tech Battalion - Wasn't there some
person who worked out a "HAD" (heavy version LAD/SAM
system) for DS2? I have some twosies missile type
tanks - 3 varieties - that I can use for "HAD" + GMS/L
+ GMS/H (very low tech, very relatively large
missiles) but if someone has already come up with a
semi-balanced set of Heavy SAM rules I would be saved
some time between now and the NOVEMBER CON in Saint
Louis...

Painting and scenario design completion will be pushed in the 3 month window
until I run 5 games (Air War C21
1/600th x 2, Air War C21 1/300th x 1 and DS 2 x 2)
mid-November without having to create my own
(un-tested) HAD RULES!

Gracias,