Hi Al Ross.
We have a topic about our Higgins MTB. Unfortunately it`s not on english, but it can be a good start.
https://www.paluba.info/smf/index.php?topic=2626.0In Yugoslav navy Higgins MTB carried tactical numbers from 101 to 179. Numbers 101-108 was original american boats, while rest was built in our shipyards in Trogir and Korčula. Between 1963 and 1965 18 of them was miodified in Motor Gun Boats ( numbers 128, 132, 146, 154, 155, 157, 158, 159, 160, 162, 164, 165, 166, 168, 169, 170, 171 and 174). In 1955 6 of MTB was donated to Egypt ( numbers 173, 175, 176, 177, 178 and 179), in 1961 2 MTB to Ethiopia ( numbers 134 and 135) and in 1963 2 MTB to Cambodia ( numbers 110 and 138). Original Higgins MTB was struck from service between 1962 and 1965, while rest of boats were struck between 1962 and 1972.