This is the link for PushX, the corporation I used.
and their forum post is here (you’ll find other corps there too):
There is also Black Frog Industries which has an excellent reputation. (Red Frog does just hi-sec, if I recall).
You might find a hauler trying to start out that might be of use, but they would also be high risk - the two above have long standing reputations and are unlikely to scam a new player.