Yes, but, expect to pay for it.
No my only reference to the model 597 Remington is for a 22lr semi-auto rifle.
the store
No.
i bought my 597 for $200 but you could proabobly find one that's cheaper.
no
Rimfire rifle made by Remington
You will probably have to contact a barrel maker.
$530.70
No. The stocks are not interchangeable. Boyds make some nice aftermarket stocks for the Remington 597 as well as the Ruger 10/22. The Ruger 10/22 has all sorts of aftermarket parts to customize the look and performance of your 10/22. The Remington 597 is just now beginning to get more aftermarket products available to customize your rifle.
Do a search for Jarvis. They make a bull barrel for the $597, it runs $198 in either blued or stainless.
Check the list of vendors on the Remington Society of America here: http://remingtonsociety.com/rsa/service
Yes, some of the remington tubes will but not all. I have a remington modified choke in my mp 153 right now.