I'm not sure if it really qualifies as homemade but there is some speculation about that Kevin Wheatcroft may be producing full scale accurate Tiger replicas based on information from the Aberdeen Tiger which he recently restored.
Also worth consideration are the Czech OT810's that most always stand in for real SdKfz.251s in films or shows (and a few museums...), one currently undergoing conversion is illustrated here:
OT810/251, (he can also do you a
T34/Tiger.)
Many more OT810 conversions illustrated
here. (along with a real one courtesy of
SdKfz.com 
)