Lots of room in the shoulder harness, but need a couple of short
(2"-4") extenders for the lap belts.

The POH / Manual states that the belts are Schroth Type 5-01-1C0701,
Part No. 000918.

The shoulder belts are integrally attached to the lap belt buckle, thus
a longer extension could compromise the shoulder belt function.

Is there a relatively easy / inexpensive solution to this problem?