Mowerfreak, if you mean use of Victa 2-strokes by other mower manufacturers, the answer is - not in recent times.
Greenfield did offer a Victa-engined ride-on [!] variant in the early 1970's though.
However, these engines were used in other applications into the 1970's. Examples were the Tiger industrial engines, which were used in some Deckson and other brand mini-bikes.
And use as an outboard boat motor, from the propeller types in the 1950's to the last one in the 1970's, the Cox Mowers 'Gulpy' jet outboard. That model was discontinued when Victa brought out their own jet outboard, and subsequently cut off supply of engines to Cox.
