space tileset

hi !
i'm searching some space tilesets to test my 2d map level editor. Where to find them ? (no boss or ennemies, 32x32, just landscape). My game is a vertical space shooter !

for example :
(but with more details and for a vertical shooter)

or this

Thanks for your links !

Looks like you already found some. If it's a 'test' then what does it matter?