First, please search the site in our default leech list:
http://fpl.my-proxy.com/liststat.phpproxy-list.biz, proxyz.net, publicproxyservers.com, proxylist.com.ru, proxylist.sakura.ne.jp, nntime.com, cnproxy.com, proxy4free.com, haozs.net, proxylists.net are already in the default leech list!
FPL doesn't support samair.ru now.
xroxy.com shows the proxies by picture that can't be leeched.
FPL can't leech my-proxy.com.
About other sties, you should be able to get proxies from them.
About proxyz.com and spy.pp.ru, your link is OK. It will be more effective if you use this format:
http://www.proxz.com/proxy_list_high_anonymous_0.html|proxy_list_high_anonymous_|0
http://spy.pp.ru/proxylist-page-1.html|proxylist-page-|0