All Classified forums require a Site Supporter subscription. It is only $25 per year and you can buy and sell whatever you like on the forum. To become a Site Supporter, go to Your Profile and select "Paid Subscriptions."
I do not have pics of blue interior, but what I have done in the past is get the paint code, go to a paint supply store and have them match me paint to the paint code. Slate blue probably has shade differences, so to get it as close to possible you will need the code. Did you get the code ? If not this site might help to show you the color http://www.tcpglobal.com/autocolorlibrary/ , hope this helps out.
Color matching doesn't work 99% of the time using pre-mad colors, to get it right on you'll need to have it mixed special for you with the part you want to match there too. The new can of stuff may match the color your parts were 20+ years ago, but they won't match right up with how it is now. they all fade, so if you're really picky, just be prepared to paint everything. Thats what I had to do on my '78 and its been religiously garaged since day one.
In 3 to 5 years (weather permitting) I expect my old blue seatbelts to match my new gray seats