Sarik Hobbies do the plans for the 100 class HSL, they include various versions in the plans.
I have a video on old VHS but last time I played it the quality had degraded.
You could ask Portsmouth Historic Dockyard as the real 102 is based with their Boatyard No4 area with other similar types like the seaplane tender, MASB 81, RSL and a landing craft F8.
Hope this helps.