Yes
100-500 USD
100-1000 USD depending on EXACT variation, box, accessories, papers, history.
1924 was the first year for wood grips. 1924
The 132 came with plastic or wood grips. Some of the plastic grips had Checkering, however I do not believe the wood grips ever had checkering.
The correct grips for a BHP Capitan with a serial starting in "73c" would typically be plastic grips. However, it's possible that wood grips may have been installed by a previous owner. It's best to verify with a trusted gunsmith or contact the manufacturer for confirmation.
Wood
Try e-gunparts.com
100-460 or so
No. Not English ones anyway, they were made of wood.
For assembling wood furniture, it is best to use wood screws. Wood screws have a coarse thread that grips the wood securely, providing strong and durable connections.
Impossible to answer without a detailed description of all features.
Depends on when it was made. Usually you see Walnut and Goncalo Alves.