100-400 or so
Neither Revelation nor Western Field made firearms. The first is a brand name retailed by Western Auto and the second by Montgomery Ward. The Revelation 220 is a Mossberg 800 and the 225 a Savage 340.
25-80 USD
http://www.thegunrack.net/Magazines/centerfire_rifle_magazines.htm This is a Savage model 340, magazine in .222 caliber costs $24.95 plus shipping from this site.
The Revelation Rifle marketed by Western Auto Stores in .222 Rem is essentially a Savage 340. Clips are sold by Brownells.com for $30.99 plus shipping
See: http://www.gun-data.com/tour7.html this may help you.
Search for Savage 340 scope mount. The Revelation 225 was manufactured by Savage. Several online retailers offer different styles.
Between 80-225 dollars,depending on overall condition and a good bore.
0-225 USD depending on specifics
Best to ask a gunsmith for assistance.
Try e-gunparts.com
The Revelation 222 is the same rifle as the Savage 340, a single-lug low-end rifle. It lacked any deluxe features save for impressed checkering on some models and was always considered an "entry level" rifle. However, they were well-made and had a reputation for reasonable accuracy. Price range is $150 to $225 depending on condition.