A mere $10.98? I was 11 in 1963 and that would have bought 6 or 7 1/25th scale kits. Those kits are now $20 to $30.
I can understand Revell's unwillingness to make these again. The demand just isn't there. I used to work in a factory that molded plastic parts. The molds might be paid for ,but they still require maintenance ,the presses are $$$$$,Not to mention the cost of all that styrene ,the sheer size of the packaging ,add labor and shipping and overhead... You get the idea.
If you want a Big Drag bad enough,do like I did. buy the parts from Ebay. I made mind from original parts,new parts,whatever it took. The blower is the hard part. I found this one,and it was painted (nicely) so it may be resin. not sure.