i got one for u at the south left corner of the map the bio waste dump there is a tunnel
walk and walk until u cant go any further in the tunnel there is a pool of water in that pool spawns a crossbow

well thats how i found it.

 

alot of crossbows there at deeds C9 area, thats where our bases are and we have so many crossbows its insane.

 

I've found tons of crossbows just about everywhere. Tables in camps, storage containers in camps, toxic dumpsite tables, even the little campfire with a folding seat out in the middle of nowhere.

 

I find crossbows all the time around the G6 area where the log cabins are just outside of the dam

 

I haven't been up by there in a while but I remember Bumjick had a lot of them back in the day.

 

The Recycling Plant is a good place lately. I made a Guide on the topic. Hopefully it's helpful to you.