If it was a USPS money order you should be able to get the funds back if the money order is lost.
If you sent it to them at 3pm on a Monday it would seem likely that they should have received it by Saturday at least. Of course I can never understand the workings of the USPS. Sometimes something posted to an address in the same city takes longer to get there than something posted to the other side of the country.
~Doug~ In dog beers, I've only had one.
AC0568105 EAMUS CATULI!
My hovercraft is full of eels.