What year is sn#01001654 Minolta Maxxum HTsi plus?

SOURCE: need battery chamber lock for

I'm assuming you need the whole chamber door. I think it would be pretty hard to find just the door, so I would suggest buying another HTsi Plus just to get the part you need. I looked on Ebay and saw an "HTsi body for parts". It was $30(USD) including shipping, not too bad. If there was a source to purchase just the door, I'm sure it would cost $10-20; so buying another camera body might be a better choice. You could probably buy a decent used/working HTsi for around $60-75. So it is up to you to decide what your best course of action is. If it is the door that you need, they are removed very easily (no tools needed).