I have no experience with the Purple Heart padded weapons, but I am going to try out Lance's Realistic Sparring Weapons as soon as the next paycheck comes in (which unfortunately will be in awhile), check it out at
www.rsw.com.hk.
many ARMA members make their own sparring weapons, I am sure you can find instructions on this site or otherwhere.
When it comes to learning a wooden waster is perhaps the first item to aquire, for technique(sp?) as well as semi-sparring, + its cheap <img src="/forum/images/icons/grin.gif" alt="" /> . I can't recommend you on a special manufacturer for wasters (but others can), mine is oak and easily splinters along the fibers though, I bought it from another ARMA member and cant remember where it was made.
www.varmouries.com as well as others sell aluminium swords for sparring, more realistic than wasters and cheaper than blunts, but you still need protective gear, at least for the parts of yourself that you want to keep from achieving veteran sparring status too fast <img src="/forum/images/icons/smirk.gif" alt="" /> .
Cheers.