I have two suggestions for you. You can try Daisy directly at their Customer Service (See the link below) or another web link that offers all sorts of air gun repairs. See Link #2 below.
The Super Streak B1500BTM is .177 caliber rifle. What do you want to change it to?Go to (see the link below) and on the home page, at the bottom, you will find "Download manual / Parts Diagram" open it and select "Benjamin Sheardon pistols and rifles"At the top of the page you will find a parts manual with diagrams along with how to contact Crosman for the parts that you need.
Go to Numrich Gun Parts Corp.They should have what you need.
Try e-gunparts.com
what type of scope mounts do I need
Crosman still has parts for this rifle. contact Crosman at the link below (Customer service) and order the parts you need.
You will need about a 10' X 4' area to use the Body Solid Powerline Cable Crossover Machine.
You need a copy of the owner's manual for your rifle- trust me- parts of the bolt are tricky. You can get a copy for free from Winchester is you are in the US. The link below will take you to their order form on their website.
The rifle does not need to be disassembled to clean it. However, if you want to, the owner's manual has instructions for PARTIAL disassembly. The link below will take you to the owner's manual for that rifle. Would suggest you print and keep a copy.
You need to state the model number. If you want to take the time go to the Crosman link below and locate your model it will most likely have a parts diagram to identify parts and their location in the pistol. Click on "download a manual" at the bottom of the linked page.
misfire?
You need the services of a good gunmsith.
You are really going to need a gunsmith- first, you will need to identify WHICH Japanese rifle you have, then obtain a bolt, and THEN have the bolt fitted to the rifle- these are NOT "drop in" parts. Some parts are available on the used market, but expect a bolt to be over $100 for the parts, plus labor for the fitting- IF the rifle is otherwise in safe firing condition. Some Japanese military rifles were made as TRAINERS- they are for blank ammo only. See a gunsmith for this one.