Found these currently on Ebay if still in need. http://cgi.ebay.com/ebaymotors/Ferrari-Daytona-Testarossa-US-style-knock-offs-NEW_W0QQcmdZViewItemQQcategoryZ10076QQitemZ4578372640QQrdZ1
Or how bout this rare package of splined adapters, bolts and a wheel nut. Feast or famine if you're looking for this stuff. http://cgi.ebay.com/ebaymotors/HUB-AND-LUGS-FOR-87-FERRARI-TESTAROSSA_W0QQcmdZViewItemQQcategoryZ42614QQitemZ8003064820QQrdZ1