This pistol was made between 1978 and 1984. Crosman no longer supplies parts for this model, But the offer a free service to locate shops that repair older Crosman air guns. See the link below
The Crosman 357W is a pellet pistol not an Airsoft pistol.
Crosman offers a service to locate shops that repair older products. See this link. http://www.crosman.com/general/find-a-service-center
Crosman offers a free service to locate shops that repair older air guns and rifles. See the link below.
you can buy them from importers for about $150 USD
Crosman no longer supports this air pistol, but there are independent shops that make a living repairing air rifles/guns. Places like MAC1 in California. Corsman also offers a free service to locate these shops. See the link below.
Not really. It will leak out eventually. Besides by leaving a charged C02 cylinder in the pistol keeps pressure on the seal and this may damage it over time. I always take the cylinder out of the pistol when I am finished shooting. No matter how much C02 is left int the cylinder. It doesn't cost that much to put a new Cylinder in the pistol when I want to use it again. Besides leaving it in the pistol will eventually reform the seal. I want it to return to a normal shape between shooting sessions. Is it cheaper to buy a new cylinder or have the pistol repaired because the seal is warped.
All the extra doo-dads do not make the pistol perform any better. Now if you want it to look cool and the extra $80 is no problem, then it will buy you a pistol that shoots the same with of without all the attachments. It's up to you and your wallet.
10-125 USD
Crosman has the information online. See the link below
Crosman offers a free service to locate shops that repair older Crosman air rifles. See the link below.
There are several independent shops that repair older Crosman air rifles. One of them may have what you need. Crosman offers a free service to direct you to these shops. See the link below.