Where did the Nimbus 2000 come from?

[mrflynn6]

No: HPFGUIDX 36917

This small detail has been nagging at me for a few years now.  Where 
did the Nimbus 2000 come from?  We know that McGonagall "sent" it to 
Harry, but who paid for it?  Would she have paid for it herself?   
Would she have made arrangements for the money to be taken out of 
Harry's vault at the bank?  Can she do that?

My off the wall theory on this is that Dumbledore is in contact, 
somehow, with Harry's parents and they are the ones that got the 
broom.  I think that either James and Lily are ghosts (although JKR 
has stated in one of the interviews on the Scholastic website that 
only unhappy people become ghosts) or something similar or are not 
truly dead?  They are in contact with D'dore and the three of them 
arranged for the broom.

I still think that D'dore will turn out to be a relation of Harry's-
perhaps his grandfather and thus would have some connection to James 
and Lily.

Gretchen