Don't know if these can be adapted but maybe some ideas.
http://www.jpcycles.com/productdeta...D-42DCE0DCFA02&store=All&page=4&search=spider
http://www.jpcycles.com/productdeta...6605ED1CF2&store=All&page=1&search=spider gas
http://www.jpcycles.com/productdeta...D-42DCE0DCFA02&store=All&page=4&search=spider
http://www.jpcycles.com/productdeta...6605ED1CF2&store=All&page=1&search=spider gas