Take a peek at Keith Tanner's modified jeep top on his 88 here http://keith.miata.net/landy/colorado1.htm
I have the pieces to install the same Bestop unit on my 109, but have never actually used it since installing the o.e. canvas tilt and just rolling up the sides.
The Bestop bits are certainly cheaper, I've just never put it on.
Don't hesitate to contact Keith Tanner at the info listed on the above site.
West Des Moines, IA
Rats, that link doesnt' work .... try this one http://keith.miata.net/index'.html
Ok, I'm apparently an internet dopofus.
and floolw the links foir Basil the Land Rover in Colorado.... or look at http://keith.miata.net/landy/images/tailgate.jpg