I looked at TJ's Liners and see that Todd offers a bunch of .40 liners: various bore dimensions and three different twist rates. 5/8" outside diameter. $5.20 per inch. For my money I'll always go with TJ's - excellent quality (match grade), perfect dimensions, plus they're hammer forged not button rifled like Redman's liners (which is what Brownell's sells I think). I never lined a barrel that big, only have done .22's with their liners. Only problem with TJ's is getting through to them, they're a one and/or two man operation and they prefer to work instead of answer the phone. Email is best, they will get back to you, eventually.
