Spacer kit for MDT long action magazine?

[Cactus kid]

My main rifle is a tikka that lives in an @XLR chassis, inletted for the long action magazine.

Currently I have the 3.56 MDT magazines that run great in the chassis.

I am adding a few barrels to my line up, including a .223 and possible 6arc

Does anyone make a spacer kit to the 3.56 magazine so i can run these shorter calibers a little easier?

 

[Soloften]

Did you ever find a solution? I have several tikka LA rigs and chassis and would like to run the chassis with longer mags for NRL hunter events, alas the 3.56 is only 5 rd. Seems like an aluminum spacer at the top of a SA mag that would allow the detent to connect for mag changes would do it. Permanent install on the SA mag and no changes to the chassis or LA inletted patterns. Would be good for @XLR and MDT tikka patterns.