You need the services of a gunsmith.
25-65 or so
best let a gunsmith dissemble & clean it
Try gunpartscorp.com- and are you sure that its not a J-22?
About $75, more or less, depending on the condition.
Follow the instructions in the owner's manaul. If you don't have one, call Glock.
No published sn data
How much is a car? Depends on the car, and on the pistol. A Jennings J-22 might sell for $75. A Ruger Mark II heavy barreled target pistol- $375. An Olympic grade Hammerli- $1,075.
$30 - $80. Low quality firearms intended to be low cost.
"AE" prefix indicates 1968 Value depends upon condition; fair - $50 to Excellent $165
Check with your local gunshop- they may be able to order one. You can also check gunpartscorp website. Unfortunately, expect the magazine to cost about half the value of the pistol.
25-100 USD or so depending on specifics