"Do I need a D10,000 set?"
A moment's reflection and you'll realise that yes, of course you do. You always have done, but perhaps you hadn't realised it.
In fact, you've been so long without one, you may need two. With this in mind, we've got them in two different sizes:
Standard (16mm) at £1.50 GBP per set.
Large (21mm) at £2.20 GBP.
So, random numbers from 1 to 10,000 are within your grasp. Or, if you prefer, 0 to 9,999.