I was issued with 2 leatherette hinged pen cases some years ago. The plastic inside to hold the pens and needles is beginning to look a bit unhygienic. I understand the cases, made by Libby, are now classed as no longer issued. However, I find them very useful. Does anyone know where and how I can obtain a replacement? PS, Google and my local NHS diabetic team cannot help. See photo attached of cases in question.