HD6 info

My son and I took on a new restore project in the form of an AC HD6B.  #14991 and motor #6-15256.  We have loved digging in learning together.  We have a Pump repair facility where we rebuild vacuum pumps and industrial pumps of all kinds and shapes, so we have lots of machine shop and welding capabilities.  We began by draining everything, lots of water, mucky oil etc.  Pulled the starter as it would not engage, and found the bendix gear chewed up.  Replaced the gear and decided to check the flywheel with a bar for engine mobility.  Ceased.  Pulled the injectors and loaded the cylinders with a good penetrating solution, 50/50 acetone ATF, and let her sit for a few days.  We rocked her slowly for a few days and she finally gave way.  Put the starter back in yesterday and gave here a 24v shot in the fanny and she puked out all the penetrating concoction we shoved down her throat.  We were excited.  We decided to clean the injectors really well before going back in with them.  Here is where my first question comes in.  We got a good spray pattern out of 3 of the injectors.  However, one just wouldn't chooch.  Looking closely at it under a jewelers loop, we saw lots of pitting and decided to replact the injector tip or whole injector if we could not find just the tip.  We are coming up short all the way around.  Does anyone know where or if these old Bosch injectors are available?  Tip# DLLD 150S153 or full Injector #KBLB9681/13.

We are new to the forum and new to Allis Crawlers.  We love restoring things as a Father Son team.  Looking forward to all replies, and we will post pictures if anyone is interested.  Pretty sure this is a wet clutch, as it has a screw on filter by my Left foot and a second dip stick by the oil level.  Thanks in Advance.....