Welcome @Virgil to the site..., A few more posts, and you'll be able to download files..., (minimum posts before downloads keeps some of the spam out.)
There are a number of threads on belt replacement for the 490t. Do a search on some keywords and you'll find them...
AND they reference the type and size of belt by name 'SBS 2.4'.
You should find a source on Ebay - there are several, if you search there. Don't pay an arm and a leg...,
Here's a full belt-size table thread from @zumbini CD Player/Changer Belt Size Database - Parts depot - TheCarversite!
And here's a 490t belt replacement post/thread for you: Carver SD/A-490t door won't open - source repair - TheCarversite!
Stick around and post, share, and explore ! We love Carver fans, here..., and post a picture of your rig..., brag a big 😉