There are some budget gags you can make yourself pretty easily.
Get two pencils or similar objects, and some rubber bands/hairbands.
Also a great and cheap ball gag that will only require you to buy some rope is this.
http://www.youtube.com/watch?v=lAGYoP4MbEI
Also for the future it would be fun to see you transformed into a slutty kitty.
But it should be carried out properly so you would need some things.
Cat ears(my sub found some cheap ones at a toy store)
Markers to draw whiskers on yourself with.
Black pantyhouse and a really tigth black top. Cut openings for nipples and ass/pussy.
Tail butt plug to finish it of.
I can imagine a pic of you on all fours in front of a bowl of milk from some different angles.