What Sandman are you going to replicate? HQ, HJ, HX or HZ? I'd use a colour right for whichever on you choose.

If you are going to do HZ for a replica I think there are only 3 x choices: Jasmine Yellow, Palais White or to be different (as none have yet come to light) Ultra Blue. The first two look really good with stripes, darker colours not so much. I haven't seen an Ultra Blue Sandman but it is an awesome colour in the flesh, can look blue or purple.

http://www.holdentorana.com/paint/pi...0523/30523.jpg
http://www.holdentorana.com/paint/pi...523/305231.jpg

This will give an idea on the HZ Sandman nose in Ultra Blue:

http://gallery.oldholden.com/Mr_Jone...+Blue.JPG.html
http://gallery.oldholden.com/Mr_Jone...Blue2.JPG.html


HJ have some fantastic non-mainstream colours if you want to go somewhere different from Absinth Yellow or Jamaica Lime, and look great in:

Claret http://gallery.oldholden.com/Mr_Jone...+Met2.JPG.html,
Satin Mist http://gallery.oldholden.com/Mr_Jone...t+Met.jpg.html,
Cyclamen http://gallery.oldholden.com/Mr_Jone...n_001.JPG.html,
Sepia http://gallery.oldholden.com/Mr_Jone...Sepia.jpg.html,
Mandarin red http://gallery.oldholden.com/Mr_Jone...darin.jpg.html.

HQ I'm a huge fan of these:

Saffron http://gallery.oldholden.com/Mr_Jone...ffron.jpg.html,
Sunburst http://gallery.oldholden.com/Mr_Jone...t+met.JPG.html,
Orchid http://gallery.oldholden.com/Mr_Jone...rchid.JPG.html,
Sable http://gallery.oldholden.com/Mr_Jone...able1.jpg.html,
Aquamarine http://gallery.oldholden.com/Mr_Jone...rine1.jpg.html.

GOOD LUCK!