Sorry, i dont have patch with normal letters, i try'ed make for self normal C1 font but give up after same type problem like in you questions, but I thought problem in LargeFont-e and SmallFont-e, maybe you can solve this problems for another way.
Problem in systextures/l2font-e.utx
try change alpha channels (in photoshop with dds plugin) in LargeFont-e and SmallFont-e
make more thinner alpha channel around each letter.
Try this http://rgho.st/6zyqZ8YC9 i have that weapon for Interlude, i think need only fix lines for C4. In archive 4 weapons - gods blade (forgotten), old sword of damaskus, old dragons slayer, old brach of mother tree
Download C2 client, get it data from armorgrp.txt and weapongrp.txt (С2) to your C1 files, same with systextures folder from C2 to C1 New textures weapons and armor (D,C,B,some A grade items) first appear in C2