I duplicated cable lifts like these out of hardwood and used Sterling Size 105 5" X 5/8" rubber bands from Amazon for the suspension:
http://shunyata.com/index.php/products-vm/accessories/df-ss-detail
Also adhered this constrained layer vibration absortion material to the bottoms of the wood wedges for additional vibration damping (not visible when the lifts are in place):
https://www.amazon.com/gp/product/B01KZ5X7KO/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1
I cannot say whether I lost anything by using wood vs CF material (like Shunyata) for the bases, but I think that the rubber band suspension and damping material account for the majority of the improvement I hear, which is quite significant.
The tension on the rubber bands can be adjusted to match the weight of the cables.
A great sonic improvement for around $15 for each lift.
Best to you t_ramey,
Dave