usually, when towns go prefab, it's because the park and rec department already has a relationship with the prefab vendors, since many of them also sell regular playground equpiment. (slides, swingsets, etc)
its a tough sell to try to convince a city to go with a skater staffed firm they don't know when for YEARS, the swingset salesman has been telling them his company has everything a skatepark needs... it sucks.