Use my generator for your own custom plug or use one of plugs provided by me in most common diameters (30/40/50/60/80/100mm) 

Plugs have push-fit tolerance by default

Parameters:
- Diameter (outer diameter)
- Length (tube length)
- Thickness (tube thickness)
- Flange thickness
- Flange offset (difference between tube diameter and flange diameter, 60mm diameter and 6mm offset results in 86mm flange diameter) 
- Diameter tolerance ( 0.2 means push-fit, change if you need loose fit, 60mm diameter and 0.2mm tolerance results in 59.8mm final diameter)