Get a PROPER lash adjuster tool! I got mine from eBay, still not got round to doing my own, but a mate was struggling to get them back in with a pry bar, so borrowed my tool and got them in no bother.
You will get them out no bother with a pry bar, but getting them back in is not so easy. Also, to save having to rock the car to rotate the engine, get the front just off the ground on axle stands and take off the front drivers side wheel, you will see a hole in the wheel arch liner that has the crank pully right behind it, via this hole you can use a ratchet and a long extention bar to crank the engine over, obviously make sure it's not in gear when doing so.
Just had a look on eBay for you and can't find any, there is a template to make your own somewhere over the road, and I might have it on my home PC, but at work just now.
Just need to cut it out of 2-3mm steel, mine looks like it has been cut on a flow jet or something, very smooth & precise.