"...Got a 1948 map of Israel showing the territory staked out?"
No.
Any map of the 1947 UN Resolution 181 proposal will suffice.
Because that is the cited basis for the claim, as stipulated in the May 1948 Declaration.
Given that the Arabs started bombing on the night of Israeli Independence Day, I'm guesssing that the Jews were a little busy fighting for their lives, and did not get around to such luxuries as publishing maps for another year or two afterwards.
Do you really, in your wildest-assed hairy dreams, actually believe that the absence of a map in May 1948 with the name "Israel" written upon it, makes the slightest difference in the world to anyone not currently locked-up in an insane asylum?
It doesn't signify... it doesn't mean anything... it doesn't change anything... although, I'm sure, you could use that argument, if you had the means to build a time-machine and could warp back to 1948 and lay that in front of the UN Secretary General...
Do you have any idea how foolish that sounds - rather like saying that the lunch-box that Bobby has been carrying-around for the past year is actually yours, because you called dibs on it some months after Bobby did, but because you specified the dimensions of the lunch-box whereas Bobby did not?
Two words for that...
Puh-leeze...
Grow up, Tinny... and try to drag a few of your less-insane compatriots back into the light with you.