Logically it makes more sense to cast a set of HanDs and Feet.
They don't have to be Harrison's.
Indeed you could make the positions more realistic considering he has only a microsecond between whatever frees his bonds and raising his arms up.
Reading around it seems Harrison wears a size 12 shoe (you know what they say about men with big shoes... big FEET HA HA HA) and he is 6ft 1 so positioning an approximate set of shoes shouldn't be too hard.
Feet and hands are generally proportional so he should have the hands of a man with size 12 shoes.
There must be someone Ady knows with size 12 feet?