can anyone suggest a good online full length practice DAT
that i can download or buy
but a comp version

thanks

yes topscore pro or DAT achiever
both come with 3 full length tests

DAT achiever - Superhard, especially PAT, will probably do better on the real thing
Topscore Pro - more comparilbe to real scores, but PAT is all the same (it doesn't change from test to test)