All I can find are the "split" lock washers, not the bigger "star" ones Leland has on his web site.
Are these good enough? Advantages of the "star" type?
Relating to driver mounting woofer to baffle panel.
lock washers
Re: lock washers
Have you tried Home Depot or CTC? Both of those stores have them...I know because I've seen them. 
TomS
Re: lock washers
mc master carr has everything!!
http://www.mcmaster.com/#star-washers/=a2cy3l
http://www.mcmaster.com/#star-washers/=a2cy3l
2 - OTop8
2 - T39
8 - DR200
2 - DR250
9 - T24
6 - T45
1 - Auto Tuba
2 - T39
8 - DR200
2 - DR250
9 - T24
6 - T45
1 - Auto Tuba