I use the Novolin R from Walmart as part of my insulin therapy, along with Novolog/Admelog and Lantus/Basaglar.
Do you have reusable/refillable pens that you were previously using, or were you using the disposables?
Lantus Solostar and NovoRapid disposable pens do not appear to be refillable from those of us here on FUD that big on DIY.
You can use the Luxura, NovoEcho, and Humapens with cartridges that can be refilled over and over again using your Novolin vials.
There are more than a few posts by Eric, myself, and others here at FUD that explain how you might be able to do this.
Eric has an excellent post about the wide variety of Insulin pens floating around out there in D-Land.