The problem you will find in having a truly matching rollerball pen and pencil set is that the rollerball must have a cap such that the ink does not dry out. There are kits made to have a similar appearance, but if you are looking for a truly matched pair you will likley be disappointed. As for gel pens, they are a middle of the road option, having some of the characteristics of a rollerball (such as smooth inkflow) and some of the ballpoint (such as the ink not drying out).