If you like 1/24 Porsche 917's there are alternatives, and they are absolutely stunning! But they are resin made and there is no engine detail, and they are quite expensive too... I will give you the info anyway :
Profil 24 (€ 100 or $ 100 for a kit) : pricelist
here :
Some examples :
Le Mans Miniatures (€ 110 or $ 110 for a kit) : pricelist
here :
Some examples :
Hope to be of any assistance?